Peephole for built-in lighting fixture aiming device

Abstract

A peephole for a built-in lighting fixture type aiming device. A frame portion projected on an edge portion of an opening portion is formed on the side thereof with an engaging groove, a frame type hook plate is placed in contact with the peripheral edge of a window glass by a spring member and engaged by a hook with the engaging groove provided in the frame portion, and a seal gasket is held by the frame portion and the window glass with the aid of elasticity of the frame type hook plate to provide an airtight construction. The window glass is mounted by the frame type hook plate avoiding the need for a threaded mounting.

What is claimed is: 
     
       1. A peephole for a built-in lighting fixture type aiming device comprising: a housing having a peephole opening;   a projection surrounding said opening, said projection having an external surface provided with engaging grooves on opposite sides of said external surface;   a transparent member;   a sealing gasket having a shape substantially conforming to a shape of a free end of said projection surrounding said peephole;   said transparent member having a marginal portion substantially conforming to the shape of said gasket for receiving said gasket;   a frame-shaped hook plate having a central opening of a shape substantially conforming to said peephole opening and at least first and second integral locking legs extending downwardly from said frame and provided with a recess engaging portion for engaging said recess;   said transparent member being positioned between said hook plate and said gasket;   said frame member compressing said gasket when the recess engaging portions of said locking legs are each engaged in an associated one of said recesses; and   the frame-shaped member being formed of a springy material which serves to retain the locking legs in engagement with said recesses.   
     
     
       2. The apparatus of claim 1 wherein said springy material is steel. 
     
     
       3. The apparatus of claim 1 wherein said frame-shaped member has a substantially rectangular shape and said legs are arranged along opposite parallel sides of said frame-shaped member. 
     
     
       4. The apparatus of claim 1 wherein said marginal portion of said transparent member is provided with a recess for receiving and seating said gasket. 
     
     
       5. The apparatus of claim 1 wherein said legs extend substantially downwardly from said frame-shaped member and free ends thereof comprising said recess engaging portions are bent inward to form a substantially C-shaped configuration to define a bent portion which extends into an associated one of said recesses.